US Bridges

246 ST over Firesteel Ck

PoorClosed to traffic

Aurora County, South Dakota · 6.8E 7N Plankinton · Structure no. 000000002228080

Built
1930
95 years old
Condition
Poor
inspected June 2016
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
65
2022 count
Owner
County
County Highway Agency

About this bridge

246 ST over Firesteel Ck is a steel stringer/multi-beam or girder carrying 246 ST over Firesteel Ck in Aurora County, South Dakota. It was built in 1930, so it is 95 years old, older than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 65 vehicles a day, roughly 2% of them trucks, projected to reach 65 by 2032. The structure is 32 ft (9.8 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries246 ST
CrossesFiresteel Ck
Location6.8E 7N Plankinton
RouteCounty Highway 0
Coordinates43.819, -98.34734
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2016
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating3 US tons
Inventory rating3 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2022)
Projected traffic65 by 2032
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$181,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 246 ST over Firesteel Ck built?

It was built in 1930, making it 95 years old in 2025.

What condition is 246 ST over Firesteel Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2016.

How much traffic does 246 ST over Firesteel Ck carry?

About 65 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 246 ST over Firesteel Ck?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 16 ft wide.

Who owns 246 ST over Firesteel Ck?

It is owned by the County Highway Agency.